42. How would you distinguish between ice and ice-cream with your eyes closed?
43. State the various functions of the tongue ? Name four different tastes which can be detected by our tongue.
44. Can we survive only on grass and raw leafy vegetables ? Give reason for your answer.
45. Which parts of the tongue detect the following tastes?
(a) Bitter (b) Sweet (c) Sour (d) Salty
Answers
Answer:
42. we can distinguish between Ice and ice cream with our eyes closed by as we touch ice we can feel it cold and solid whereas as we touch icecream we can feel it cold and soft
43. the function of the tongue is to taste, to maintain saliva in our mouth
the four different a stage which can be detected by a tongue is better ,salty ,sweet ,and sour.
44. we cannot survive only on grass and raw leafy vegetables because we can get various diseases.like lack of vitamins, fat, carbohydrates
45. bitter can be detected on the last the end part of the tongue sweet can be detected the front part of the tongue and sour salty can be detected on the either two side of the tongue
Answer:
42. We can distinguish between ice and ice-cream (even with our eyes closed) from their taste. A piece of ice kept on the tongue will appear to be tasteless whereas a piece of ice-cream will give a sweet taste.
43. The various functions of the tongue are as follows:-
(a) The tongue helps in mixing saliva with food during chewing (which is essential for the digestion of food).
(b) The tongue helps in swallowing the food into the food pipe.
(c) The tongue helps in getting the taste of food.
(d) The tongue is essential for talking (or speaking).
Four different tastes that can be detected by our tongue are sweet, salty, bitter and sour.
44. No, we cannot survive only on grass and raw leafy vegetables.
This is because, grass and raw leafy vegetables cannot provide us with all the nutrients that we need.
45. (a) Most of the taste buds at the front of the tongue detect sweet and salty tastes. The maximum effect of sweet taste is felt at the tip of the tongue whereas the maximum effect of salty taste is felt just behind the tip of the tongue.
(b) Most of the taste buds at the sides of the tongue detect sour taste.
(c) Most of the taste buds at the back of the tongue detect bitter taste.
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